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Modelling Erythroblastic Islands: Using a Hybrid Model to Assess the Function of Central Macrophage
- Source :
- Journal of Theoretical Biology, Journal of Theoretical Biology, Elsevier, 2012, 298, pp.92-106. ⟨10.1016/j.jtbi.2012.01.002⟩, Journal of Theoretical Biology, 2012, 298, pp.92-106. ⟨10.1016/j.jtbi.2012.01.002⟩
- Publication Year :
- 2011
-
Abstract
- International audience; The production and regulation of red blood cells, erythropoiesis, occurs in the bone marrow where erythroid cells proliferate and differentiate within particular structures, called erythroblastic islands. A typical structure of these islands consists of a macrophage (white cell) surrounded by immature erythroid cells (progenitors), with more mature cells on the periphery of the island, ready to leave the bone marrow and enter the bloodstream. A hybrid model, coupling a continuous model (ordinary differential equations) describing intracellular regulation through competition of two key proteins, to a discrete spatial model describing cell-cell interactions, with growth factor diffusion in the medium described by a continuous model (partial differential equations), is proposed to investigate the role of the central macrophage in normal erythropoiesis. Intracellular competition of the two proteins leads the erythroid cell to either proliferation, differentiation, or death by apoptosis. This approach allows considering spatial aspects of erythropoiesis, involved for instance in the occurrence of cellular interactions or the access to external factors, as well as dynamics of intracellular and extracellular scales of this complex cellular process, accounting for stochasticity in cell cycle durations and orientation of the mitotic spindle. The analysis of the model shows a strong effect of the central macrophage on the stability of an erythroblastic island, when assuming the macrophage releases pro-survival cytokines. Even though it is not clear whether or not erythroblastic island stability must be required, investigation of the model concludes that stability improves responsiveness of the model, hence stressing out the potential relevance of the central macrophage in normal erythropoiesis.
- Subjects :
- Erythroblasts
Macrophage
MESH: Feedback, Physiological
medicine.medical_treatment
Cell Communication
Quantitative Biology - Quantitative Methods
0302 clinical medicine
Cell Behavior (q-bio.CB)
Erythropoiesis
MESH: Erythroblasts
Quantitative Methods (q-bio.QM)
Erythroblastic islands
Feedback, Physiological
0303 health sciences
MESH: Bone Marrow Cells
Applied Mathematics
General Medicine
Cell biology
medicine.anatomical_structure
Biological Physics (physics.bio-ph)
030220 oncology & carcinogenesis
Modeling and Simulation
General Agricultural and Biological Sciences
Intracellular
Hybrid model
Statistics and Probability
FOS: Physical sciences
Bone Marrow Cells
Biology
Models, Biological
General Biochemistry, Genetics and Molecular Biology
03 medical and health sciences
MESH: Cell Communication
medicine
Extracellular
Humans
[SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology
Physics - Biological Physics
Progenitor cell
030304 developmental biology
MESH: Humans
General Immunology and Microbiology
Macrophages
Growth factor
MESH: Erythropoiesis
MESH: Models, Biological
MESH: Macrophages
Spindle apparatus
FOS: Biological sciences
Quantitative Biology - Cell Behavior
Bone marrow
Subjects
Details
- Language :
- English
- ISSN :
- 00225193 and 10958541
- Database :
- OpenAIRE
- Journal :
- Journal of Theoretical Biology, Journal of Theoretical Biology, Elsevier, 2012, 298, pp.92-106. ⟨10.1016/j.jtbi.2012.01.002⟩, Journal of Theoretical Biology, 2012, 298, pp.92-106. ⟨10.1016/j.jtbi.2012.01.002⟩
- Accession number :
- edsair.doi.dedup.....1ebbeecfd29bfd38daaddd15e0b58f09